78151012 has 12 divisors (see below), whose sum is σ = 137008620. Its totient is φ = 39005696.

The previous prime is 78150983. The next prime is 78151013. The reversal of 78151012 is 21015187.

It can be written as a sum of positive squares in 2 ways, for example, as 22886656 + 55264356 = 4784^2 + 7434^2 .

It is a super-2 number, since 2×78151012² = 12215161353248288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78151013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14893 + ... + 19444.

It is an arithmetic number, because the mean of its divisors is an integer number (11417385).

Almost surely, 2^78151012 is an apocalyptic number.

It is an amenable number.

78151012 is a deficient number, since it is larger than the sum of its proper divisors (58857608).

78151012 is a wasteful number, since it uses less digits than its factorization.

78151012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34910 (or 34908 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 78151012 is about 8840.3061032976. The cubic root of 78151012 is about 427.5414266251.

Adding to 78151012 its reverse (21015187), we get a palindrome (99166199).

The spelling of 78151012 in words is "seventy-eight million, one hundred fifty-one thousand, twelve".